I lost a lot of functionality although I am a subscriber. I already re-installed the app, it didn't help. I need your help to solve it!

Hello,
I lost most of the functionality in study mode, as you can see on the attached screenshot. (See eg. I cannot use highlighter, text box, image box, etc.)
I already deleted and reinstalled the app on my Mac.
I used to be able to use it well, I didn’t change anything, and with the newer files I added, I have very limited functionalities even though I am a paying customer.
I need to use it to prepare for my exams. I need you to resolve this issue for me as soon as possible.
Let me know please how to proceed!

Thank you!
Melinda

Dear Marginnote team. This is probably my 7th message regarding this issue, and I haven’t received proper support. It is really disappointing. There must be a solution for this issue, especially since I’m paying for a service I cannot fully use due to some strange issue.
Please, help me resolve this as soon as possible.
Thank you!
Melinda